docs: broaden hero copy to cover all animation triggers, not just scroll

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ryo-manba

docs/src/pages/index.astro

@@ -66,7 +66,7 @@ const categories = [
         Animate with <span class="gradient-text">just HTML</span>
       </h1>
       <p class="text-lg md:text-xl text-text-secondary max-w-2xl mx-auto mb-8" data-anim="fadeInUp" data-anim-delay="100ms">
-        Drop-in scroll animations using HTML attributes. Built-in anti-FOUC protection. Under 3KB. No dependencies.
+        Drop-in animations using HTML attributes. Built-in anti-FOUC protection. Under 3KB. No dependencies.
       </p>
 
       <!-- Install one-liner -->
@@ -252,7 +252,7 @@ const categories = [
 
 <!-- 2. Add the attribute -->
 <div data-anim="fadeInUp">
-  Your content animates on scroll
+  Your content comes alive
 </div>
 
 <!-- 3. There is no step 3 -->`}

docs/src/pages/ja/index.astro

@@ -66,7 +66,7 @@ const categories = [
         <span class="gradient-text">HTML</span>だけでアニメーション
       </h1>
       <p class="text-lg md:text-xl text-text-secondary max-w-2xl mx-auto mb-8" data-anim="fadeInUp" data-anim-delay="100ms">
-        HTML属性だけでスクロールアニメーションを追加。Anti-FOUC内蔵。3KB未満。依存なし。
+        HTML属性だけでアニメーションを追加。Anti-FOUC内蔵。3KB未満。依存なし。
       </p>
 
       <!-- Install one-liner -->
@@ -252,7 +252,7 @@ const categories = [
 
 <!-- 2. Add the attribute -->
 <div data-anim="fadeInUp">
-  Your content animates on scroll
+  Your content comes alive
 </div>
 
 <!-- 3. There is no step 3 -->`}